Learn how to solve a system of equations by substitution. To solve a system of equations means to obtain a common values of the variables that makes each of the equation in the system true. To solve a ...

Before starting this guide, it may be helpful to read the guide from M1 on coordinates and graphs. To solve the equations graphically, the two lines 𝒚 = 𝒙 + 1 and 𝒚 = 2𝒙 - 1 are drawn on the same ...